NDLI: tBHBMA: a novel trifunctional acrylic monomer for the convenient synthesis of PAA-g-PCL well-defined amphiphilic graft copolymer

Content Provider	Royal Society of Chemistry (RSC)
Author	Lu, Guolin Yao, Wenqiang Li, Yongjun Huang, Xiaoyu Song, Xuemei
Copyright Year	2013
Abstract	A series of well-defined amphiphilic graft copolymers, consisting of a hydrophilic poly(acrylic acid) (PAA) backbone and hydrophobic poly(ε-caprolactone) (PCL) side chains, was synthesized by the combination of reversible addition–fragmentation chain transfer (RAFT) polymerization and ring-opening polymerization (ROP). A new acrylate monomer containing a ROP initiation group, tert-butyl(2-((4-hydroxybutanoyloxy)methyl)acrylate), was first prepared using tert-butyl acrylate as the starting material, and it was homopolymerized by RAFT in a controlled way to give a well-defined homopolymer bearing ROP initiation group in every repeating unit. This homopolymer directly initiated ROP of ε-caprolactone to provide well-defined poly(tert-butyl acrylate)-g-poly(ε-caprolactone) graft copolymers via the grafting-from strategy without post-polymerization functionality transformation. Finally, the hydrophobic poly(tert-butyl acrylate) backbone was selectively hydrolyzed in an acidic environment without affecting the PCL side chains to afford poly(acrylic acid)-g-poly(ε-caprolactone) amphiphilic graft copolymers possessing the hydrophilic PAA backbone and equally distributed hydrophobic PCL side chains. The self-assembly behavior of the obtained amphiphilic graft copolymers and pH-sensitivity of the resultant micelles were investigated by fluorescence spectroscopy, DLS, and TEM. DSC and XRD analysis showed the crystallization behavior of poly(acrylic acid)-g-poly(ε-caprolactone) graft copolymers.
Starting Page	2864
Ending Page	2875
Page Count	12
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	4
Issue Number	9
Journal	Polymer Chemistry
DOI	10.1039/c3py00046j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Spectroscopy Caprolactone Butyl group Polymerization Ring-opening polymerization Fluorescence Polymer Hydrophobe X-ray crystallography PAA Chain transfer Self-assembly Transmission electron microscopy Dynamic light scattering DSC Carboxylic acid Acrylate PCL Amphiphile Hydrophile Monomer
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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